!!! note
    Go to [Kit Assembly](./kit) to find out how to put together your Helios4 NAS

## **What you need before you start.**

**1. microSD Card<br>**
You need a microSD Card UHS-I with a minimum of 8GB. Ideally Speed Class 3.<br>
We recommend the following models:<br>
\- Samsung Evo Pro+ 32GB<br>
\- SanDisk Extreme Pro 32GB<br>
![Recommended SDcard](/img/install/recommended_sdcard.jpg)

**2. Micro-USB to USB cable<br>**
![USB cable](/img/install/console_cable.png)

**3. Ethernet cable (cat5/6)<br>**
![Network cable](/img/install/network_cable.jpg)


## **Step 1** - Download an Helios4 build image

You will need first to download a build image to write on the microSD Card.

Go to [Dowload](/download) and chose one of the latest build.

##  **Step 2** - Writing an image to a microSD Card

You will need to use an image writing tool to install on your microSD Card the build image you have downloaded.

### Under Windows, Mac OS or Linux (via Graphic Interface)

Etcher is a graphical SD card writing tool that works on Mac OS, Linux and Windows, and is the easiest option for most users. Etcher also supports writing images directly from XZ files, without any prerequired decompression. To write your image with Etcher:

- [Download Etcher](http://etcher.io) and install it on your computer.
- Insert the microSD Card inside your SD card reader (microSD to SD adapter might be needed).
- Open Etcher and select from your local storage the Helios4 .img.xz file you wish to write to the microSD Card.
- Select the microSD Card you wish to write your image to.
- Review your selections and click 'Flash!' to begin writing data to the microSD Card.

![Etcher](/img/install/etcher_flash.png)

### Under Linux (via Terminal)

```bash
$ unxz Helios4_Debian_Jessie_4.4.96.img.xz

$ dd bs=4M if=Helios4_Debian_Jessie_4.4.96.img of=/dev/sdX conv=fsync
```

##  **Step 3** - Power-up Helios4

**Before powering-up insure :**

1. You inserted the microSD Card that you prepared in the previous step.

2. You connected your computer to the serial port with the Micro-USB to USB cable.

3. You connected Helios4 to your home network with the Ethernet cable.

4. You plugged-in properly the DC power connector before powering-up the AC adapter.

![Connections](/img/install/connections.png)

**Now you can plug-in / power-up the AC adapter.**

!!! warning
    Always proceed with caution when manipulating 110/220V appliance.

##  **Step 4** - Connect to Helios4 serial console

### Under Windows

1. [Download PuTTY](https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html) and install it on your computer.

2. Select connection type **serial**.<br>
![Putty connect](/img/install/putty_config.png)

3. Setup serial port settings (Serial line : **COM1** and Speed : **115200**), then press **'Open'**<br>
![Putty config](/img/install/putty_connect.png)

!!! note
    If you computer already has a serial port then COM1 might not be the correct serial line to connect to Helios4. Check this [link](https://tnp.uservoice.com/knowledgebase/articles/172101-determining-the-com-port-of-a-usb-to-serial-adapte) to learn how to determine the right COM port.


### Under Linux (via Terminal)

1. Install picocom (under Debian/Ubuntu)
> $ sudo apt-get install picocom<br>

2. Connect to serial with picocom
> $ sudo picocom -b 115200 /dev/ttyUSB0

![Picocom](/img/install/picocom.png)

!!! note
    To exit picocom do **Ctrl-a** then **Ctrl-x**


## **Step 5** - Log in

!!! note
    You might need to press **Enter** for the login prompt to come up.

**Default credential for Debian image**

```bash
helios4 login: root
Password: 1234
```

You will be prompted to change the root password and then create a new user account.

**Default credential for OpenMediaVault image**

```bash
helios4 login: root
Password: openmediavault
```

You will be prompted to change the root password.

![First Login](/img/install/first_login.png)

## **Step 6** - Check/Set IP address

### Check IP address

By default Helios4 will try to obtain an IP address via DHCP. To figure out what is the allocated IP address you will need to type the following command in the console.

```bash
$ ifconfig eth0
```

![Network Config](/img/install/network_config.png)

Here the IP address of Helios4 is **10.10.10.1**.

!!! note
    Openmediavault comes with **mDNS** server (Avahi daemon). Therefore if your desktop/laptop runs a mDNS client you can reach the board via the following hostname address : **helios4.local**

### Set IP address

If you wish to manually configure your IP address you can use the **armbian-config** tool.

```bash
$ sudo armbian-config
```

![Armbian-config](/img/install/armbian-config.png)

![Armbian-config](/img/install/armbian-config_network.png)

![Armbian-config](/img/install/armbian-config_ip-static.png)

![Armbian-config](/img/install/armbian-config_ip.png)

You will have to reboot for the network settings to take effect.
```bash
$ sudo reboot
```

!!! info
    You can also refer to the following Debian Wiki [Page](https://wiki.debian.org/NetworkConfiguration#Setting_up_an_Ethernet_Interface) for advanced network settings.



## **What to do next ?**

**If you have installed an OpenMediaVault image, refer to the [OMV page](/omv) for further instructions.**

Otherwise you can now connect by SSH to your Helios4 to carry on with your configuration.

![SSH Login](/img/install/ssh_login.png)

![Putty SSH](/img/install/putty_ssh.png)
